Roofing Calculator

Roof replacements cost $8,000–$25,000+ — homeowners search aggressively before signing contracts. Enter building length and width, roof pitch, and cost per square to estimate total roof area, roofing squares (100 sq ft units), shingle bundles (3 per square), and material cost.

Pitch factor adjusts for 4/12, 6/12, 8/12, and steep 12/12 roofs. A steeper pitch increases actual surface area compared to flat footprint — our calculator applies the standard pitch multiplier automatically for gable roofs.

High commercial value for affiliate and lead-gen in the home services niche. Material estimate helps you evaluate contractor quotes and spot outliers before signing.

One "square" = 100 sq ft of roof area. Three bundles of standard 3-tab shingles typically cover one square. Architectural shingles may need 4 bundles per square — adjust if your product specs differ.

Add 10% waste for valleys, ridges, hips, and starter strips. Complex roofs with dormers, skylights, or multiple facets need professional measurement — use this as a budget starting point, not a binding quote.